CN103775974B - Light-focusing type lightguide and light supply apparatus - Google Patents
Light-focusing type lightguide and light supply apparatus Download PDFInfo
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- CN103775974B CN103775974B CN201310492607.1A CN201310492607A CN103775974B CN 103775974 B CN103775974 B CN 103775974B CN 201310492607 A CN201310492607 A CN 201310492607A CN 103775974 B CN103775974 B CN 103775974B
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- light
- reflecting surface
- focus
- luminous point
- face
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- KPHWPUGNDIVLNH-UHFFFAOYSA-M diclofenac sodium Chemical compound [Na+].[O-]C(=O)CC1=CC=CC=C1NC1=C(Cl)C=CC=C1Cl KPHWPUGNDIVLNH-UHFFFAOYSA-M 0.000 claims description 17
- 108091008695 photoreceptors Proteins 0.000 claims description 6
- 239000000758 substrate Substances 0.000 description 20
- 238000010586 diagram Methods 0.000 description 5
- 238000005286 illumination Methods 0.000 description 5
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Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/00163—Optical arrangements
- A61B1/00165—Optical arrangements with light-conductive means, e.g. fibre optics
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/06—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor with illuminating arrangements
- A61B1/0661—Endoscope light sources
- A61B1/0669—Endoscope light sources at proximal end of an endoscope
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/06—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor with illuminating arrangements
- A61B1/0661—Endoscope light sources
- A61B1/0684—Endoscope light sources using light emitting diodes [LED]
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/06—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor with illuminating arrangements
- A61B1/07—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor with illuminating arrangements using light-conductive means, e.g. optical fibres
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V2200/00—Use of light guides, e.g. fibre optic devices, in lighting devices or systems
- F21V2200/10—Use of light guides, e.g. fibre optic devices, in lighting devices or systems of light guides of the optical fibres type
Abstract
The present invention provides light-focusing type lightguide and light supply apparatus, realizes the raising of the utilization ratio of light source in light pipe.By LED（20）Luminous guiding light pipe（2）Light-focusing type lightguide（8）In, have from the LED（20）Luminous point at least extend to the light pipe（2）Incident end face（32）Near primary reflection surface（50）, in the primary reflection surface（50）The incident end face（32）Side forms elliptic reflecting surface（60）, elliptic reflecting surface（60）In the first focus（f1）On be configured with LED（20）Luminous point, in the second focus（f2）On be configured with incident end face（32）, in the primary reflection surface（50）LED（20）Luminous point side formed hyperbolic reflecting surface（61）, the hyperbolic reflecting surface（61）By the LED（20）Light to the elliptic reflecting surface（60）Reflection, and by the elliptic reflecting surface（60）On reflection obtain with maximum incident angle（θmax）Following angle points to the incident end face（32）Light.
Description
Technical field
The present invention relates to the guide-lighting technology that the light of light source is imported to photoreceptor.
Background technology
It is widely used in medical field etc. for observing endoceliac endoscope.On endoscope, commonly known tool
There is the light supply apparatus that illuminated light guide is guided to the light pipe of observation position and makes illumination light incide the light pipe（For example, referring to
Patent document 1 and patent document 2）.
In addition, in recent years, the LED that luminous point is small and the light quantity of per unit area is big is just practical.
Prior art literature
Patent document
Patent document 1：Japanese Unexamined Patent Publication 2012-105715 publications
Patent document 2：Japanese Unexamined Patent Publication 2011-200380 publications
The content of the invention
Problem to be solved by this invention
Light supply apparatus typically has the light-gathering optics for the plane of incidence that the light of light source is converged to light pipe.However,
In conventional light-gathering optics, the luminous utilization ratio of the LED in light pipe is low, it is difficult to which luminous using LED is peeped as in
The illumination light of mirror is effectively used.
The present invention makes in view of the above circumstances, and its object is to provide a kind of light that can be improved in light pipe
The light-focusing type lightguide and light supply apparatus of the utilization ratio in source.
For solving the means of technical problem
To achieve these goals, it is a feature of the present invention that being led by the light-focusing type of the luminous guiding photoreceptor of light source
In light device, have from the luminous point of the light source at least extend to the photoreceptor by the reflecting surface near luminous point, it is described
Reflecting surface is had elliptic reflecting surface described by luminous point side, and the elliptic reflecting surface has the first focus and the second focus, and
The luminous point is configured with first focus, is configured with second focus described by luminous point, the reflecting surface
There is curved-surface reflection side in luminous point side, the curved-surface reflection side reflects the light of the light source to the elliptic reflecting surface, and
Obtained by the reflection on the elliptic reflecting surface and the light by luminous point is pointed to the angle below defined incidence angle.
It is in the region of the reflecting surface, will in addition, it is a feature of the present invention that in the light-focusing type lightguide
The light from second focus is produced due to the size of the luminous point when entirety of the reflecting surface is set to elliptic reflecting surface
On the region for the reflected light that point deviates, the curved-surface reflection side is set.
In addition, it is a feature of the present invention that in the light-focusing type lightguide, the reflecting surface lights from the light source
Point is at least surrounded to the photoreceptor by near luminous point.
In addition, it is a feature of the present invention that in the light-focusing type lightguide, described by configuring light pipe on luminous point
End face, the curved-surface reflection side are obtained with Arcsin when the opening number of the light pipe is NA（NA）Incidence angle below angle
Degree points to the light by luminous point.
In addition, it is a feature of the present invention that in the light-focusing type lightguide, there is the optical axis for being arranged at the reflecting surface
On dichronic mirror, the reflecting surface have with from the dichronic mirror to the pair that the face of first focus is of equal value in geometric optics
Reflecting surface, and the luminous point of light source is configured in the first focus of the subreflector, will be described secondary anti-by the dichronic mirror
Penetrate the light of surface side and the light compositing of the reflection surface side.
In addition, it is a feature of the present invention that in making light incide the light supply apparatus of light pipe, there is claim 1 institute
The light-focusing type lightguide stated and the light source for making light incide the light-focusing type lightguide, the light-focusing type lightguide it is described by
Body of light by configuring the incident end face of the light pipe on luminous point, and the light of the light source is incided the light pipe.
Invention effect
According to the present invention, due to being formed elliptic reflecting surface by luminous point side in reflecting surface, in the luminous point side shape of reflecting surface
Into curved-surface reflection side, therefore, in the case that luminous point has a certain size, can also make in the luminous point side of reflecting surface
The light of reflection is efficiently incided by luminous point.
In addition, for, by the reflected light reflected near luminous point, can also control and be clicked and entered to light in elliptic reflecting surface
The incidence angle penetrated, therefore, even if in the case of being limited as light pipe to the incident incidence angle of light point, can also make light with
The incident angles corresponding with the limitation are to by luminous point.
Brief description of the drawings
Fig. 1 is the stereogram for the structure for representing the light supply apparatus that embodiments of the present invention are related to.
Fig. 2 is the three-dimensional exploded view of light supply apparatus.
Fig. 3 is to maintain the three-dimensional exploded view of unit.
Fig. 4 is the schematic diagram for the structure for representing light-focusing type lightguide.
Fig. 5 is the index path of the reflected light of primary reflection surface.
Fig. 6 assumes that index path when primary reflection surface is made up of elliptic reflecting surface.
Fig. 7 is the explanation figure of the light path of the first focus side of primary reflection surface.
Fig. 8 is the explanation figure of the light path of the second focus side of primary reflection surface.
Fig. 9 is the figure for illustrating the light beam of the LED can be incident to light pipe in a manner of guided wave.
Figure 10 is the schematic diagram for the primary reflection surface that the variation of the present invention is related to.
Description of reference numerals
1：Light supply apparatus
2：Light pipe（Photoreceptor）
7：Light source cell
8：Light-focusing type lightguide
20：LED（Light source）
20A：Luminous point
32：Incident end face（By luminous point）
40：Reflecting surface
50、150：Primary reflection surface（Reflecting surface）
51：Subreflector
55：Dichronic mirror
60、160：Elliptic reflecting surface
61、161：Hyperbolic reflecting surface（Curved-surface reflection side）
f1：First focus
f2：Second focus
Ra、Rc、Rc：Reflector space
θ：Incidence angle
θmax：Maximum incident angle
Embodiment
Hereinafter, embodiments of the present invention are illustrated referring to the drawings.
Fig. 1 is the stereogram for the structure for representing light supply apparatus 1 of the present embodiment, and Fig. 2 is the solid of light supply apparatus 1
Exploded view.In addition, in Fig. 1, in order that the internal structure of light supply apparatus 1 is readily appreciated that, lid housing 6 is represented with dummy line.
The light supply apparatus 1 is the device used in the light source of the endoscope with light pipe 2, and light pipe 2 is lengthwise
Light guide member.As shown in figure 1, light supply apparatus 1 makes light incide light pipe 2, the incident light passes through sight of the light pipe 2 to endoscope
Position leaded light is examined, so as to illuminated as illumination light.
The light supply apparatus 1 of present embodiment as shown in Figure 1 and Figure 2, possesses：Substrate box 3, protecgulum 4, bonnet 5, lid housing
6th, two light source cells 7, light-focusing type lightguide 8, holding unit 9 and heat emission fan 15.
Substrate box 3 is generally plate like in its very thin thickness, as shown in Fig. 2 there is lower house 10 and upper shell 11, and at it
Inside is accommodated with two light source substrates 12 and power supply terminal platform 13.
Light source substrate 12 is set to each light source cell 7, and each light source substrate 12 lights electricity with generation light source cell 7
The various circuits such as the LED drive circuit that the power circuit of power, control are lighted.Power supply terminal platform 13 is connected from electric wire (not shown)
The electric wire for the external power source that access port introduces and the terminal board of the electric wiring extended from light source substrate 12.
The substrate box 3 is configured in the bottom surface of light supply apparatus 1, has light source list in the upper surface 11A over-assembles of the substrate box 3
Member 7, light-focusing type lightguide 8 and holding unit 9.
Protecgulum 4 and bonnet 5 are arranged at one end and the other end of substrate box 3, are to respectively constitute light supply apparatus 1 just
Face and the rectangular plate at the back side.Mounting hole 14 is offered in the face of protecgulum 4, light pipe 2 is installed in the mounting hole 14.Lid shell
Body 6 will surround between protecgulum 4 and bonnet 5, by these protecgulums 4, bonnet 5 and lid housing 6, form approximately parallelepiped body shape
Light supply apparatus 1 housing.In addition, though diagram is eliminated in fig. 2, but corresponding with heat emission fan 15 in the face of bonnet 5
Position on formed with exhaust outlet.
Two light source cells 7 are the light sources of light supply apparatus 1, and the LED20 with an example as light-emitting component, peace
The LED-baseplate 21 for having filled the LED20 and the heat-sink unit 22 at the back side for being arranged at the LED-baseplate 21, light source cell 7 make
Light-focusing type lightguide 8 is incided in the luminous of LED20.
LED-baseplate 21 be, for example, with high-termal conductivity aluminium base, be formed as a generally rectangular, its mounting surface substantially in
Centre is provided with LED20.LED20 is display that sealed LED chip with resin 24 on the housing 23 of 1.2cm square, so-called
Surface installation type（SMD：Surface Mount Device：Surface mount device）LED package, its optical axis K be configured to
The mounting surface of LED-baseplate 21 is substantially vertical.
Two light source cells 7 are configured by being generally perpendicularly vertically mounted on the upper surface 11A of substrate box 3
The optical axis K almost parallel and mutual with upper surface 11A into each LED20 optical axis K is intersected with 90 degree.
These light source cells 7 are carried out lighting control by the above-mentioned possessed LED drive circuit of light source substrate 12, at this
In light supply apparatus 1, two light source cells 7 can be lighted simultaneously, or only light one of light source cell.Light source cell 7
LED20 is according to the application target of endoscope, the material of light pipe 2, element of the selection with suitable emission wavelength.Two light sources
The LED20 of unit 7 can use the different element of emission wavelength, and the LED20 of the light supply apparatus 1, which can be used, sends white light
White LED and the near-infrared LED for sending near infrared light.
Heat-sink unit 22 is arranged at the back side of LED-baseplate 21, be make installation surface side LED20 heat via LED-baseplate
The part of 21 radiatings, and with the multiple fin 22A extended substantially vertically from the back side of LED-baseplate 21.These fin
22A covers the substantially entire surface of LED-baseplate 21 and set.
On the upper surface 11A of aforesaid substrate case 3, ventilation is provided with immediately below the fin 22A of heat-sink unit 22
Mouthfuls 25, by the air that is blown from the ventilating opening 25 come cold sink 22A.The air blown from ventilating opening 25 is filled from light source
Put the air that 1 front imports.That is, it is in the position of its close lower end, i.e., positive corresponding with substrate box 3 in the face of protecgulum 4
Position on formed with air inlet 26.Substrate box 3, can be via air inlet 26 by extraneous air as shown in Fig. 2 its front openings
Import internal.In addition, between bonnet 5 and a heat-sink unit 22, it is configured with the inner air of light supply apparatus 1 from bonnet 5
The heat emission fan 15 of discharge.Thus, substrate box 3 is imported into from air inlet 26 by the exhaust event of the heat emission fan 15, extraneous air
Inside, and blow to fin 22A from the ventilating opening 25 of upper shell 11.When extraneous air is by substrate box 3, the substrate box 3
In light source substrate 12 be also carried out air cooling.
Light-focusing type lightguide 8 is that the device of holding unit 9 will be incided after 7 respective light compositing of light source cell, for it
Described after structure.
Fig. 3 is to maintain the three-dimensional exploded view of unit 9.
Holding unit 9 has light pipe keeping body 27 and keeping body retaining element 28.
Light pipe keeping body 27 is to maintain light pipe 2 and relative to the ejecting end of light-focusing type lightguide 8（Described later second is burnt
Point f2, Fig. 4）The device positioned, and there is snap flange 29 and holding cylinder 30.Snap flange 29 is in face of above-mentioned protecgulum 4
Mounting hole 14 and configure, and the snap-latch piece 31 of the leading section with being arranged at light pipe 2（Fig. 1）Engaging.Holding cylinder 30 passes through by before
The part at end is inserted to be kept from the snap-latch piece 31 of light pipe 2.When light pipe keeping body 27 engages with light pipe 2, lead
The incident end face 32 of the front end of light pipe 2（Fig. 4）It is located in the second focus F2 of light-focusing type lightguide 8.
Keeping body retaining element 28 is fixed in substrate box 3, and the supporting cylinder 30 to holding unit 9 supports.
Fig. 4 is the schematic diagram for the structure for representing light-focusing type lightguide 8.
As described above, light-focusing type lightguide 8 is by two 7 respective light compositings of light source cell and is incident upon holding list
The device for the light pipe 2 that member 9 is kept, the light-focusing type lightguide 8 of present embodiment are made up of the concentrator with reflecting surface 40.
Specifically, as shown in Fig. 2 light-focusing type lightguide 8 has a pair of the sheet materials 41,42 engaged up and down.In each sheet material 41,42
Formed with recess 43,44 on composition surface, pass through the combination of these recesses 43,44, the reflecting surface 40 of pie graph 4.The light-focusing type is led
Light device 8 is fixed on the upper surface 11A of substrate box 3 by retaining element 45.
Reflecting surface 40 is the optically focused for the incident end face 32 that each LED20 of two light source cells 7 light is converged to light pipe 2
Optical system, and surround near from each LED20 to the incident end face 32 of light pipe 2（Nearby）Between whole.
Specifically, reflecting surface 40 has the primary reflection surface 50 of dye and substantially hung down from the side of the primary reflection surface 50
The subreflector 51 of the tubular directly extended.Configured in each end of primary reflection surface 50 and subreflector 51 as light source
LED20, on reflecting surface 40, each LED20 light is synthesized and projected from the end of primary reflection surface 50.
Primary reflection surface 50 is the spotlight camber that its major axis is set to optical axis L 1.That is, primary reflection surface 50 is located at its light
Both ends open on axle L1, light source side opening 52 and light side opening 53 are respectively formed as, by the luminous of light source side opening 52
It is concentrated on light side opening 53.In the light supply apparatus 1, in light source side opening 52（Bore D3：Reference picture 7）It is configured with LED20,
In addition, in the incident end face 32 with being configured with light pipe 2 on the separating distance W of light side opening 53 position.Thus, LED20
Light is assembled and incides the incident end face 32 of light pipe 2.
Its is open-ended for subreflector 51, and is formed as the light source side opening 54 for configuring other LED20, and
Its optical axis L 2 is set with the square crossing of optical axis L 1 of above-mentioned primary reflection surface 50.In the optical axis L 1 of primary reflection surface 50, in optical axis
Dichronic mirror 55 is provided with 45 degree of incident angle on the intersection point P of L1 and optical axis L 2, by the dichronic mirror 55 by subreflector 51
Light and primary reflection surface 50 light compositing.The subreflector 51 with the intersection point P from dichronic mirror 55 to light source side opening 52（That is,
First focus f1 described later）The mode of equal value in geometric optics of primary reflection surface 50 be configured.That is, it is configured at subreflector 51
Light source side opening 54 on LED20 just be configured at primary reflection surface 50 light source side opening 52 LED20 in geometry
It is upper of equal value.So as to which the LED20 of the side of subreflector 51 light is also assembled and incides the incident end face 32 of light pipe 2.
Fig. 5 is the index path of the reflected light of primary reflection surface 50.
In addition, the as described above, subreflector 51 and intersection point P from dichronic mirror 55 to light source side opening 52（First focus f1）
Primary reflection surface 50 it is of equal value in geometric optics, therefore, the reflecting surface 40 of light-focusing type lightguide 8 is with primary reflection surface 50 in geometry light
It is of equal value on.That is, Fig. 5 is considered as the index path of reflecting surface 40.
As described above, primary reflection surface 50 is by the luminous light gathering reflector for being concentrated on light side opening 53 of light source side opening 52
Face.Usually as the reflection optical system being concentrated on the light of luminous point by luminous point, it is known that elliptic reflecting surface.That is, it is oval anti-
Face 70 is penetrated as shown in fig. 6, being concentrated on the first focus f1 and second focus f2 the two focuses, the first the luminous of focus f1
Second focus f2.LED20 luminous point 20A is configured with first focus f1, light pipe 2 is configured with the second focus f2
Incident end face 32, thus, the LED20 optically focused on incident end face 32 that lights.
But it is NA in the opening number of light pipe 2 in order that incide the light of light pipe 2 guided wave in the light pipe 2
When, it is necessary to which the incidence angle θ of incident light is the biggest angle=Arcsin（NA）Below.
However, on elliptic reflecting surface 70, incidence angle θ from reflected light to the second focus f2 as shown in fig. 6, remote
First focus f1 position（Close to the second focus f2 position）Upper reflection, the incidence angle θ are bigger.That is, in elliptic reflecting surface 70
On, even if reflected light is all assembled and incides the incident end face 32 of light pipe 2, with incidence angle more than the biggest angle
The reflected light incident θ also not guided wave in light pipe 2, and turn into useless light.
Therefore, on elliptic reflecting surface 70, if the incidence angle θ of reflected light be set to a little for the point of the biggest angle
M, the point M are not contributed the illumination light of light pipe 2 to the reflector space Ra of the second focus f2 sides, and turn into unwanted area
Domain.
Especially, the opening number NA of light pipe 2 is smaller, then the biggest angle is also smaller, and point M is closer to the first focus
F1 sides.Therefore, as primary reflection surface 50, extended to from the first focus f1 on the second focus f2 reflecting surface, light pipe 2
Opening number NA is smaller, then the ratio occupied by unwanted reflector space Ra is bigger, causes waste to increase.
In addition, LED20 luminous point 20A is not a little, and there is a certain size D1.Therefore, as shown in fig. 6, direction second
Focus f2 reflected light is expanded with angle γ corresponding with luminous point 20A size D1, produce from the second focus f2 deviate into
Point.But even if in the case that reflected light is expanded with angle γ, if it enters the bore D2 of the incident end face 32 of light pipe 2
In the range of, then incide the light pipe 2.However, on the deviation caused by expanding from the second focus f2, remote
Reflected on second focus f2 position, i.e., the reflected light reflected on the position close to the first focus f1, this deviation journey
Degree is bigger.In elliptic reflecting surface 70, turn into the point N roots for including the reflected light for not falling within the light composition in the range of bore D2
Solved according to the size D1 of luminous point, bore D2 and from the first focus f1 to the second focus f2 distance.Therefore, in ellipse
On reflecting surface 70, from the first focus f1 to a part the entering from light pipe 2 of the reflected light reflected on point N reflector space Rc
Penetrate end face 32 to deviate, and formed and wasted.
Especially, the bore D2 of the incident end face 32 of light pipe 2 is smaller, then above-mentioned point N is closer to the second focus f2, reflection
Ratio occupied by the Rc of region is bigger, causes waste to increase.
In this way, if it is assumed that the entirety of primary reflection surface 50 is only made up of elliptic reflecting surface 70, then exist comprising not above-mentioned
In light pipe 2 light of guided wave and comprising the reflected light for being much not incident on light pipe 2 it is such the problem of.The problem as described above,
The opening number NA of light pipe 2 is smaller, the incident end face of light pipe 2 32 bore D2 is smaller and luminous point 20A size D1 is got over
Greatly, then the problem is more notable.
In general, the opening number NA of light pipe 2 is smaller in endoscope, the directive property of illumination light is higher, so as to
Narrow scope is illuminated.Therefore, the use of opening number NA is 0.2 to 0.35 in the light supply apparatus 1（Maximum incident angle θ
Max=11.5 ° are to 20）, bore D2 about 4mm light pipe 2, compared with general light pipe, opening number NA and bore D2 are
Reduce.In addition, in the light supply apparatus 1, LED20 luminous point 20A has 1 to 2mm size D1, if do not implement it is any right
Plan, then it is above-mentioned the problem of significantly occur.
Therefore, in the light supply apparatus 1, primary reflection surface 50 is set to following such structure, without being merely set to ellipse
Circle reflecting surface 70.
That is, shown in 50 Fig. 5 as in the previous of primary reflection surface, above-mentioned point N to the second focus f2 reflecting surface are set to oval anti-
Penetrate face 60.In addition, be formed as the first focus f1 to point N reflector space Rc being set to the structure of hyperbolic reflecting surface 61, i.e. ellipse
First focus f1 to point N reflector space Rc are set to the structure of the compound elliptical mirror of hyperbolic reflecting surface 61 on circle reflecting surface 60.
As shown in Figure 5 and 7, hyperbolic reflecting surface 61 is to utilize its reflected light（Primary event light）In above-mentioned elliptical reflecting
Reflection on face 70（Secondary reflection light）To obtain the reflecting surface for the reflected light E for pointing to the second focus f2.The hyperbolic reflecting surface 61
It is designed to：So that the reflected light E on elliptic reflecting surface 70 falls in the range of the bore D2 of light pipe 2 and with maximum incident
The incident mode of below angle θ max angle, makes light incide reflector space Ra.In addition, in order to effectively utilize above-mentioned reflection
Region Ra, as shown in figure 5, the hyperbolic reflecting surface 61 is designed to：Can also be obtained in reflection on reflector space Ra by
Reflected light E caused by secondary reflection on elliptic reflecting surface 70.
Thus, the reflected light on reflector space Rc（Primary event light）As shown in figure 8, by anti-on elliptic reflecting surface 70
Penetrate, turn into angle below with the biggest angle and towards the reflected light E in the range of the bore D2 of light pipe 2.Its
As a result, it is possible to the most of of the reflected light on reflector space Rc is incided light pipe 2, thus LED20 luminous utilization
Efficiency improves.In addition, in fig. 8, primary event occurs on elliptic reflecting surface 60 for the light on LED20 so as to be gathered in second
Focus f2 light, eliminate diagram.In addition, subreflector 51 is also anti-with intersection point P to the first focus f1 of dichronic mirror 55 master
It is of equal value in geometric optics to penetrate face 50.That is, in the same manner as primary reflection surface 50, the first focus f1 of subreflector 51 is to point N's
Reflector space Rc is set as hyperbolic reflecting surface 61.
Even here, as shown in figure 8, there occurs the reflected light E of secondary reflection on elliptic reflecting surface 60, by
Reflected on nearly second focus f2 position, the incidence angle θ incident to incident end face 32 is bigger, near the second focus f2, enters
Firing angle θ exceedes above-mentioned the biggest angle.The reflected light E of such secondary reflection even if incide light pipe 2 also without
Guided wave, and turn into useless light.Therefore, the light-focusing type lightguide 8 is configured to：By the second focus f2 nearby setting by
Light side opening 53 is without making elliptic reflecting surface 60 extend to the second focus f2 so that reflected light E more than the biggest angle
Will not be invalidly incident.
From the second focus f2（The position of the incident end face 32 of light pipe 2）Distance W to light side opening 53 passes through by two
Point Q when reflected light E incidence angle θ caused by secondary reflection exceedes the biggest angle is limited.
But in the light-focusing type lightguide 8, naturally it is also possible to which elliptic reflecting surface 60 is extended into the second focus f2.
Here, the light beam of the neighbouring above-mentioned hyperbolic reflecting surface 61 of direction is set into light beam φ 1, elliptic reflecting surface 60 will be passed through
On primary event be concentrated on the second focus f2 light beam and be set to light beam φ 2, and the light beam for being directly incident on light pipe 2 is set
For light beam φ 3.According to the primary reflection surface 50, as shown in figure 9, on the light beam φ 1 in LED20 radiating light, φ 2 and φ 3,
The incident end face 32 of light pipe 2 is incided with the biggest angle.In addition, only between light beam φ 3 and light beam φ 2
The light beam φ 4 of scope exceedes the biggest angle, or the light as the scope for not falling within incident end face 32.
In this way, by using the primary reflection surface 50, make the LED20 most light beam φ 1 in addition to light beam φ 4 to
φ 3 incides light pipe 2 and carries out leaded light, therefore can extremely efficiently utilize LED20 radiating light.
In addition, in the light supply apparatus 1, the opening number NA of light pipe 2 is 0.2, the biggest angle=11.5 °, bore
D2 is 4mm, and LED20 luminous point 20A size D1 is 1.2mm.In addition, primary reflection surface 50 is arranged to：First focus f1 with
Second focus f2 distance is 150mm, and light source side opening 52 is the 1.2mm equivalent to above-mentioned size D1, and light side opening 53 is
Equivalent to above-mentioned bore D2 4mm.
So, according to present embodiment, elliptic reflecting surface 60 is formed in the second focus f2 sides of primary reflection surface 50, and in master
First focus f1 sides of reflecting surface 50 form hyperbolic reflecting surface 61.Therefore, there is size D1 even in LED20 luminous point 20A
In the case of, it can also make close to first focus f1 position（Fig. 5 reflector space Rc）The light of upper reflection efficiently enters
It is mapped to the incident end face 32 of light pipe 2.
In addition, on the reflected light reflected on the reflector space Ra near the incident end face 32 of elliptic reflecting surface 60,
It can control to the incident incidence angle of the incident end face 32 of light pipe 2.Therefore, it is possible to make light with the maximum incident angle θ of light pipe 2
Below max angle is incident, and can reduce without guided wave and as the incident light of useless light.
, will be by the case where the entirety of primary reflection surface 50 is set into elliptic reflecting surface 70 in addition, according to present embodiment
Produce that to be set to hyperbolic from the reflector space Rc of the reflected light of the second focus f2 incident end face 32 deviation anti-in LED20 size
Penetrate face 61.Thereby, it is possible to the most of of the light for making the size D1 due to LED20 luminous point 20A and deviateing from incident end face 32
Incide light pipe 2.
In addition, according to present embodiment, primary reflection surface 50 is set to extend to entering for light pipe 2 from LED20 luminous point 20A
The structure penetrated end face 32 nearby and will surrounded between them.Therefore, it is possible to by LED20 light substantially close in the state of to
Light pipe 2 imports, and realizes the raising of LED20 utilization ratio, and can suppress the interference light towards light pipe 2.
In addition, according to present embodiment, there is the dichronic mirror 55 being arranged in the optical axis L 1 of primary reflection surface 50, primary reflection surface
50 be to have the subreflector of equal value in geometric optics with the face of the first focus f1 from dichronic mirror 55 to the primary reflection surface 50
51 structure.Also, primary reflection surface 50 is to be configured with LED20 on the first focus f1 of subreflector 51 and pass through dichronic mirror
55 by the light of the side of subreflector 51 and photosynthetic structure of the side of primary reflection surface 50.
Thereby, it is possible to increase output light quantity.In addition, the illuminant colour by changing one of LED20, can be simply
Obtain the output light for being mixed with multiple illuminant colours.
In addition, only example goes out a mode of the invention to above-mentioned embodiment, idea of the invention is not being departed from
In the range of arbitrarily can deform and apply.
For example, in the above-described embodiment, it is assumed that the first focus f1 of primary reflection surface 50（Luminous point 2OA）Side is set to double
Bent reflecting surface 61, but not limited to this.As long as that is, on elliptic reflecting surface 60 above-mentioned reflector space Ra reflect LED20 light,
And light is made with the incident end face of the angle sensing light pipe 2 below the biggest angle by the reflection on reflector space Ra
32 curved-surface reflection side, then it can use arbitrary curve form.
In addition, for example, in the above-described embodiment, constitute the setting dichronic mirror 55 in the optical axis L 1 of primary reflection surface 50
Thus by two LED20 photosynthetic reflecting surface 40, but it is not limited to this.That is, for example, it is also possible to such as using dichroic rib
Mirror is taken the light compositing of more than three for dichronic mirror 55.Alternatively, it is also possible to be not provided with subreflector 51 on reflecting surface 40, and
Formed using only primary reflection surface 50.
In addition, for example, in the above-described embodiment, so that LED20 optical axis K is consistent with the optical axis L 1 of primary reflection surface 50
Mode, the LED20 is arranged at primary reflection surface 50, but be not limited to this.
That is, the as shown in Figure 10 or so that optical axis L 1 of primary reflection surface 150 and LED20 optical axis the K angle as defined in
The mode for spending δ configures LED20.In this case, on primary reflection surface 150, in position corresponding with above-mentioned reflector space Rc
On also form curved-surface reflection side 161, elliptic reflecting surface 160 is also formed on other positions.In addition, LED20 is relative to main anti-
The 1 inclined angle δ of optical axis L for penetrating face 150 is determined so that more light beams in LED20 injection scope α can be in master
Reflected on reflecting surface 150, and incide light pipe 2.
In addition, as long as primary reflection surface 150 has what is intersected with LED20 optical axis K after being divided into two parts along optical axis L 1
Side is sufficient for requiring.
In addition, light source is not limited to LED20, but preferably it is the light source close to spot light as far as possible.
In addition, for primary reflection surface 50 and each LED20 of subreflector 51, output or illuminant colour can also be used different
LED20.
Claims (4)
- A kind of 1. light-focusing type lightguide, by the luminous guide arrangement of light source in the incident end face of the light pipe by luminous point, its feature It is,The light-focusing type lightguide possesses reflecting surface, and the reflecting surface linearly extends, and with the incident end face with light pipe Opposed one end and the other end for the luminous point for being configured with light source, the reflecting surface extend to the other end from one end,The reflecting surface possesses elliptic reflecting surface, the elliptic reflecting surface have the first focus for being configured with the luminous point and Second focus by luminous point is configured with, the elliptic reflecting surface is configured in a side for the reflecting surface,The elliptic reflecting surface has the reflector space for the second focus side for being configured in the elliptic reflecting surface,The structure of the reflector space is to carry out primary event to the radiating light from the luminous point, so that it is existed with configuration More than the opening number NA of the light pipe by luminous point angular second focus of incidence is incident,The reflecting surface has curved-surface reflection side, and the curved-surface reflection side is configured in the another side of the reflecting surface, And be formed as making the radiating light from the luminous point to carry out primary event, to be incident upon the institute of the elliptic reflecting surface The shape of reflector space is stated,The curved-surface reflection side has following shape：By the curved-surface reflection side carried out primary event light incide it is described ellipse The reflector space of circle reflecting surface, and in the reflector space by secondary reflection so that it is with below the opening number NA Incident angles are to described by luminous point.
- 2. light-focusing type lightguide according to claim 1, it is characterised in thatThe institute in the region of the reflected light from the incident end face deviation of the light pipe is produced in the size by the luminous point State reflecting surface and the curved-surface reflection side is set.
- 3. light-focusing type lightguide according to claim 1 or 2, it is characterised in thatWith the dichronic mirror being arranged on the optical axis of the reflecting surface,The reflecting surface have with from the dichronic mirror to the subreflector that the face of first focus is of equal value in geometric optics, And the luminous point of secondary light source is configured in the first focus of the subreflector,By the dichronic mirror by the light of the subreflector side from secondary light source and the reflection surface side from described The light compositing of light source.
- 4. a kind of light supply apparatus, makes light incide light pipe, it is characterised in that has：Light-focusing type lightguide described in claim 1；AndLight is set to incide the light source of the light-focusing type lightguide,The light-focusing type lightguide, by the incident end face that the light pipe is configured on luminous point, makes the light source in the photoreceptor Light incide the light pipe.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012-232292 | 2012-10-19 | ||
| JP2012232292A JP5780227B2 (en) | 2012-10-19 | 2012-10-19 | Condensing light guide and light source device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103775974A CN103775974A (en) | 2014-05-07 |
| CN103775974B true CN103775974B (en) | 2018-01-30 |
Family
ID=50437207
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310492607.1A Expired - Fee Related CN103775974B (en) | 2012-10-19 | 2013-10-18 | Light-focusing type lightguide and light supply apparatus |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US9332892B2 (en) |
| JP (1) | JP5780227B2 (en) |
| CN (1) | CN103775974B (en) |
| DE (1) | DE102013220358A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160166136A1 (en) * | 2014-12-10 | 2016-06-16 | Boston Scientific Scimed, Inc. | Thermal management for medical devices and related methods of use |
| DE102018104629A1 (en) | 2018-02-28 | 2019-08-29 | Branson Ultraschall Niederlassung Der Emerson Technologies Gmbh & Co. Ohg | Waveguide for plastic welding, assembly for plastic welding, a welding method and a method of manufacturing a waveguide |
| US20210055538A1 (en) * | 2019-08-22 | 2021-02-25 | Fraen Corporation | Optical system having tapered light transmission element |
| CN112904472B (en) * | 2019-11-19 | 2023-04-11 | 泰科电子(上海)有限公司 | Electronic device, electronic module, and electronic device assembly |
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Also Published As
| Publication number | Publication date |
|---|---|
| JP2014086186A (en) | 2014-05-12 |
| DE102013220358A1 (en) | 2014-04-24 |
| US9332892B2 (en) | 2016-05-10 |
| US20140112016A1 (en) | 2014-04-24 |
| JP5780227B2 (en) | 2015-09-16 |
| CN103775974A (en) | 2014-05-07 |
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